Grinding disk



F. G. B. RODEL.

GRINDING DISK.

.Mar. 27, 1923';

FILED OCT. 29. 1920.

Patented Mar. 27, 1923.

PATENT FRIEDRICH GUSTAV BERNHARD RGDEL, OF LU'IZEN, GERMANY.

GRINDING DISK.

Application filed October 29, 1920. Serial No. 420,486.

To all whom it may concern:

Be it known that I, FRIEDRICH GUSTAV BERNHARD Roman, a citizen of the German Republic, residing at Lutzen, Germany,have invented certain new and useful Improvements in Grinding Disks (for which I have made applications in Germany, Feb. 4,1916; Switzerland, July 7 1917; Austria, July 2, 1917 Poland, Nov. 4;, 1919; and Czechoslovakia, Jan. 16, 1920; England, July 9, 1920; France, July 8, 1920; Belgium, Aug. 6, 1920; Italy, July 9, 1920), of which the following is a specification.

/Vith grinding disks of larger diameter it happens frequently that they burst under the effect of the considerable centrifugal forces, which is rather dangerous. They further become in use easily eccentrical so that so much material has to be removed upon the entire circumference that they become concentric again. This removing of material is troublesome work and makes the disk wear rapidly. Large grinding disks are further expensive.

It has been proposed already to mount in the circumference of a metal disk grinding bodies adjustable in radial direction. These grinding bodies are made adjustable only in order to bring the grinding disk back to its original circumference when certain parts of the same are worn. This adjustability in radial direction can be used only in such cases where the working surfaces have no determined profile which has to be maintained accurately.

This invention has for its object to make adjustable grinding disks with determined working profiles e. g. disks which are designed to grind the flange of the teeth of toothed wheels, in such a manner that the profile remains unchanged.

This object is obtained, according to this invention, through giving to the several grinding bodies mounted in the circumference of the metal disk. the shape of segments or of circular disks, each body having the proper working profile and being rotatable around axles which are all parallel with the axle of the grinding disk or stand at a certain angle to said axle. The grinding bodies are thus not adjusted radially but revolved.

Such grinding bodies can be used only where the working piece is clamped at a certain distance from the center of the disk, but not in cases where it is pressed by hand against the grinding bodies. The profile of the grinding surfaces of the grinding disk can be of any shape.

lln the accompanying drawing a form of construction of the invention shown by way of example in which Fig. 1 is an elevation and Fig. 2 a cross section.

The grinding disk is composed of a metal body 41 having a groove Z) along its periphery and of a number of small grinding disks 0 which are mounted in said groove 2) so that they have all the same distance from the axle of the metal body a. The mounting of the grinding disks 0 in position is eifected by means of screws d, which contract the opposite walls of the groove 2) so that the disks 0 are securely clamped in position. After the screws [Z have been removed the grind-- ing disks 0 can be turned around their axles which are preferably formed by said screws (Z.

I claim An improved grinding disk for grinding the flanges of the teeth of toothed wheels comprising in combination with a metal disk serving as support provided with a circular groove in its periphery, a shaft upon which said metal'disk is mounted, screws placed at equal distances into the rim of said metal disk so that they stand parallel with the said shaft and disk shaped thin grinding bodies of convenient profile mounted upon said screws so that they can be clamped in between the two edges of the grooved rim of said metal disk and are spaced so that the grinding of the flanges of the teeth can be observed through the intervals between the disks.

In testimony whereof I aiiix my signature in presence of two witnesses.

FRIEDRICH GUSTAV BERNHARD RilDEL.

lVlt esse Vrcron BERGER, ALBERT S'rmcKnRr. 

